Mr. Bean, sent on a mission to California to escort the world famous painting of "Whistler's Mother" to its new home in The Grierson Gallery. What the gallery owner, one of the richest men in America, and his curator Davis Langley believe, is that Mr. Bean is Dr. Bean, a renouned art expert. In fact he is just a sleepy-headed, wildly eccentric museum gaurd.

He's also one of the clumsiest, craziest, wackiest, wildest, most bizarre character they have ever come across, and certainly not someone you'd entrust one of the world's most valuable paintings to. But they have- and now wreaking havoc in the Grierson Gallery and wrecking Langley's marriage is just the begining. With only hours to go before the official unvieling by the museum's benefactor, General Newton, something terrible has happened to the "Whistler's Mother" and only one man has the power to put it right. The only problem is... That man is Bean.